WS2812 RGB LED Breakout module
What's
a wearable project without LEDs? Our favorite part of the Flora
platform is these tiny smart pixels. Designed specifically for
wearables, these updated Flora NeoPixels have ultra-cool technology:
these ultra-bright LEDs have a constant-current driver cooked right into
the LED package! The pixels are chainable - so you only need 1 pin/wire
to control as many LEDs as you like. They're easy to sew, and the
chainable design means no crossed threads.
This is the second version of the Flora NeoPixels, which runs at at 'high speed' 800KHz communication. Unfortunately
they are not back-compatible with the chip-on-back 'low speed' (400KHz)
Flora NeoPixels. If you have a project that already uses low speed
pixels, and you want to attach more pixels to the chain, you will need
to purchase version 1's as these are not cross-compatible.
These
pixels have full 24-bit color ability with PWM taken care of by the
controller chip. Since the LED is so bright, you need less current/power
to get the effects you want. The driver is constant current so its OK
if your battery power changes or fluctuates a little.
Each
pixel draws as much as 60mA (all three RGB LEDs on for full brightness
white). In theory, the Flora can drive up to 500 pixels at 30 FPS (it
will run out of RAM after that). However, after about 10 pixels (or if
the distance between pixels is more than an inch or two) the resistance
of the thread can affect the power supply. For large quantities of
pixels over 10, you may want to consider using stranded core wire or
copper braid to provide a "power bus" for the pixels - the current draw
will add up fast!
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